According to work energy principle, work done by …………………..in displacing body …………………to…………………… in………………. .

State work energy principle.

According to work energy theorem or work energy principle, work done by net force in displacing a body is always equal to change in K.E. of the body. Similarly , if some work is drawn from the body, K.E. of the body decreases by the same amount. In either process, we assume that potential energy of the body does not change. Read the above passage and answer the following question: (i) A car weighing 500 kg is running at a speed of 72 km//h . In how much distance will it stope by applying a braking force of 4000N? (ii) What are the implication of this theorem in day to day life ?

The work done by kinetic friction on a body :

The work done by kinetic friction on a body :

State and explain work energy principle.

Work done by a force in displacing a body is an example of

According to the work- energy theorem, work done by a force on a body is equal to change in its kinetic energy. Prove the theorem.

Work done on the body by force or work done by the body ?

According to the work energy theorem, the work done by the net force on a particle is equal to the change in its